dodge



me M5551.)l 2 sheets-sheet -1.

J. M. DODGE.

FRIGTION CLUTCH.`

No. 554,583. Patented P55. 11, 1595.

, nverbto Witnesses Jawa/es M Do'age Iby im www (No Model.) A 2sheets-Sheena.

`.LIMLDODGR FRITION CLUTCH..

No. 554,583. Patented Feb. 11, 1896.

Inventar Nite STATES l JAMES M. DODGE, OF PHILADELPHIA,

PENNSYLVANIA, ASSIGNOB TO THE LINK-BELT ENGINEERING COMPANY, OF SAMEPLACE.

FRlCTION-CLUTCH.

SPECIFICATION forming part of Letters Patent N o. 554,583, datedFebruary 1 1, 1896.

Serial No. 527.970. (No model.)

To tZZ whom, t may concern.'

Beit known that I, J AMES M. DOD GL, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Friction-Clutches, of Awhich the following is aspecification.

The object of my invention is to so construct a friction-clutch that thegripping-levers will be brought to their extreme positions and therelocked without materially releasing the grip.

I'Ieretofore in the construction of leverclutches of this character ithas been impossible to lock the lever without releasing the grip to aconsiderable extent. Consequently the final grip would not be as greatas that exerted on the center line prior to locking. By my invention Iovercome this difliculty, as fully described hereinafter.

Referring to the `accompanying drawings, Figure l is a longitudinalsectional view of my improved friction-clutch. Fig. 2 is aview lookingin the direction of the arrow 2, Fig. l. Fig. 3 is a view looking in thedirection of the arrow 3, Fig. l. Fig. 4 is a detached perspective viewof the gripping-levers. Figs. 5 and 6 are diagrams illustrating theaction of the levers.

The clutch shown in the drawings is arranged to couple a driven to adriving shaft in line, but it will be understood that the clutch may bemounted on the driving-shaft or driven shaft, and the casing may be usedas a pulley or may have gear-teeth on its periphery without departingfrom my invention, or the wheel or pulley may be formed on either of theelements of the clutch.

A is the driving-shaft and B is the driven shaft. Secured to the shaft Ais a clutchhead A' having teeth o, and keyed to the shaft Bis a carrierB' for the clutching mechanism.

D is a disk mounted on a sleeve D', adapted to the end of the shaft B inthe present instance. The disk D has teeth d which engage with the teetha on the clutch-head A'. The teeth a and d are so arranged that theyallow for the slight movement of the disk when engaged by the clutchingmechanism.

The disk D has a series of oriiices in the present instance, as shown inFig. .l and by dotted lines in Fig. 3, and I mount in these orificesblocks d', of wood or other material. These blocks extend beyond eachface of the disk, as shown in Fig. l, so that the friction mechanismwill engage with them and not with the disk. When they become worn theycan be readily replaced. n At one side of the disk D is the web b of thecarrier B', and on the opposite side is a clutchring d. The periphery ofthe ring is notched k6o at c, and adapted to these notches are tonguesb2 on the rim b' of the carrier B', thus insuring the turning of thering with the carrier. In the drawings I have shown a series ofoperating-bolts F connected to a series of levers, but as these boltsand levers are simply duplicates of one another I will simply describeone set. Each bolt is screwed into the ring and through the web of thecarrier B', and mounted on each bolt between the ring and 7o the web isa springf. These springs tend to force the ring away from thefriction-disk.

Each lever G has its fulcrum att' ina block I carried by the bolt F. Theblock is held in position 4by nuts f' on the bolt. The por- -75 tion gof the lever G and the lever 72. form a knuckle-joint, the lever hhaving its fulcrum at h' in pockets b3 in the web b' of the carrier B',the portion g of the lever G having a knuckle g', adapted to a socket h2in the le- 8o ver H.

The portion g2 of the lever G extends back of the bolt F, as shownclearly in Fig. l, and is bent so as to bring the pivoted point g3 nearthe center line of the bolt. This arm of the lever is connected to alink J, pivoted at j to an operating-sleeve J adapted to slide on theShaft B.

The parts are so set in the present instance that when theoperating-sleeve J is forced 9o toward the carrier B' the parts 0f theknucklejoint are on the line y and the link J is on a line x at rightangles to the line y, and by moving the pivoted point j beyond the lineas indicated in Figs. l and 6, the lever will be locked withoutmaterially releasing the clutching-disk, as the movement at theknuckie-joint, owing to the arrangement of the' lever, is very slight.

When it is wished to release the clutch, the roo sleeve is turned backfrom the carrier and the parts assume the position shown in the diagramFig. 5.

I have shown four sets of clutching-levers but it will be understoodthat any number may be used without departing from my in vention, theconstruction depending upon the size oi the clutch.

I claim as my inventionl. The combination in a friction-clutch, of thecarrier, the clutching ring, the disk mounted between the carrier andring, with a series of levers G and 7L forming knucklejoints, blockscarried by the ring and to which the levers G are pivoted, each leverhaving a rearward extension, a link pivoted to each extension, and anoperating-sleeve to which the links are pivoted, substantially asdescribed.

2. The combination in a friction-clutch, of the carrier, theclutching-ring, the frictiondisk mounted between the ring and thecarrier, bolts on the ring passing` through the carrier, a series oflevers G and 7L forming knuckle-joints, said carrier having sockets forthe levers 7L, blocks carried by the bolts and havingI sockets for thelevers G, each le ver G having,` a rearward extension, a link pivoted toeach extension back of the bolt, and an operating-sleeve to which thelinks are pivoted, said operating-sleeve being so adjusted in respect tothe pivot-points of the links and levers that it can be moved past aline at right angles with the center lines ol' the levers so as to lockthe parts in their adjusted positions, substantially as described.

The combination of the carrier, the clutching-ring having bolts adaptedto pass through the carrier, a disk mounted between the ring; andcarrier, adjustable blocks I carried by the bolts, levers G adapted tosockets in the blocks l and having knuckles g', levers 7L having socketsadapted to the knuckles and bearing in pockets on the carriers, links .Tpivoted to the levers G and an operating-sleeve to which said links arepivoted, substantially as described.

In testimony whereof I have signed my naine to this specification in thepresence oi two subscribing witnesses.

J AMES M. DODGE.

Witnesses:

llIURRAv (l. BOYER, .TosEPH Il. KLEiN.

